diff --git a/expandybird/Makefile b/expandybird/Makefile
index df97481fd..16f0c7882 100644
--- a/expandybird/Makefile
+++ b/expandybird/Makefile
@@ -19,7 +19,6 @@ include ../include.mk
 DOCKER_REGISTRY := gcr.io
 PREFIX := $(DOCKER_REGISTRY)/$(PROJECT)
 IMAGE := expandybird
-TAG := latest
 
 ROOT_DIR := $(abspath ./..)
 DIR = $(ROOT_DIR)
diff --git a/include.mk b/include.mk
index fba7d5f4e..28b957e61 100644
--- a/include.mk
+++ b/include.mk
@@ -5,6 +5,8 @@ info:
 	@echo "Project: ${PROJECT}"
 	@echo "Image: ${IMAGE}"
 
+TAG := $(shell echo `date +"%s"`_`date +"%N"`)
+
 .PHONY: test-unit
 test-unit:
 	@echo Running tests...
diff --git a/manager/Makefile b/manager/Makefile
index 2e3a2ad55..209c874f2 100644
--- a/manager/Makefile
+++ b/manager/Makefile
@@ -19,7 +19,6 @@ include ../include.mk
 DOCKER_REGISTRY := gcr.io
 PREFIX := $(DOCKER_REGISTRY)/$(PROJECT)
 IMAGE := manager
-TAG := latest
 
 ROOT_DIR := $(abspath ./..)
 DIR = $(ROOT_DIR)
diff --git a/resourcifier/Makefile b/resourcifier/Makefile
index 1b80a7dca..9d6eebe1a 100644
--- a/resourcifier/Makefile
+++ b/resourcifier/Makefile
@@ -21,7 +21,6 @@ include ../include.mk
 DOCKER_REGISTRY := gcr.io
 PREFIX := $(DOCKER_REGISTRY)/$(PROJECT)
 IMAGE := resourcifier
-TAG := latest
 
 ROOT_DIR := $(abspath ./..)
 DIR = $(ROOT_DIR)